> For an opaque window, yes, I see slightly faster compositing. For atranslucent window I can't tell the difference. For a translucent image over a translucent image, thousands is clearly slower.
Well, I've found something that's clearly faster in thousands than millions, but it's not something I use all that often: video. The difference there is astounding. And that makes sense, because the frames aren't being pre-rendered do it's not re-dithering them when it does compositing.
Also, I've been doing some more digging, and it looks like the PCI bus on the 7x00 is a problem. I've seen figures as low as 17 MB/s quoted for PCI bus benchmarks. :-P
I've also seen this limitation in ATA/33 cards. I have 2 PCI TurboMax ATA/33 cards (the first ones made for the Mac). In Macs older than the Beige G3s (my 7600 and Mactell clone tested), I get a maximum of 17 MB/sec read and 23 MB/sec write with ATA/33 HDs which normally get 30 MB/sec Read & Write with the same PCI card in my Beige G3. Obviously there is a speed limitation here but whether it's due to the TurboMax card or the 7600's PCI, I don't know.
- Tom
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